Sensing device

A method of producing a device for sensing a target species, the method comprising:

• providing first and second components, each comprising a support film, wherein at least one of said first and second components comprises at least one working electrode supported on the respective support film, at least one of said first and second components comprises at least one counter electrode supported on the respective support film, at least one of said first and second components defines a containing barrier supported on the respective support film, and at least one of said first and second components comprises an array of spacer structures supported on the respective support film;
• depositing a volume of liquid electrolyte on said first component;
• laminating said second component to said first component so as to spread said volume of liquid electrolyte out in a space created by said array of spacer structures within a liquid electrolyte area bounded by said containing barrier;
• wherein said liquid electrolyte functions to transport at least one electrochemical reaction product of an electrochemical reaction of the target species at the working electrode to the counter electrode for a counter electrochemical reaction at the counter electrode;
• and
• wherein said array of spacer structures is formed by a method comprising forming a patternable layer of spacer structure material, or precursor thereto, on the respective support film, and patterning said patternable layer in situ on the respective support film.

A method of producing a device for sensing a target species, the method comprising:

• providing first and second components, each comprising a support film, wherein at least one of said first and second components comprises at least one working electrode supported on the respective support film, at least one of said first and second components comprises at least one counter electrode supported on the respective support film, at least one of said first and second components defines a containing barrier supported on the respective support film, and at least one of said first and second components comprises an array of spacer structures supported on the respective support film;
• applying adhesive to at least one of the first and second components before lamination;
• depositing a line of liquid electrolyte material at a proximal end of said first component successively laminating increasingly distal portions of said second component to said first component in a lamination direction so as to spread said volume of liquid electrolyte out in a space created by said array of spacer structures within a liquid electrolyte area bounded by said containing barrier;
• wherein at least a part of said adhesive applied to said first and/or second components defines an array of pairs of line sections of adhesive, each pair of line sections converging to a respective meeting point in a direction opposite to said lamination direction;
• and
• wherein said liquid electrolyte functions to transport at least one electrochemical reaction product of an electrochemical reaction of the target species at the working electrode to the counter electrode for a counter electrochemical reaction at the counter electrode.